Science Exam 9-22 Flashcards

1
Q

What are three types of bias

A

Measurement, selection, and confirmation

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2
Q

What is measurement bias and how is it avoided

A

A systematic error that arises because of how data is collected

Make sure that instruments and methods are accurate

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3
Q

What is selection bias and how is it avoided

A

A systematic error that arises when a sample does not represent the target population

Random sampling

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4
Q

What is confirmation bias and how is it avoided

A

A systematic error that arises when we select evidence to support our hypothesis

Acknowledge other explanations for the result and seek evidence that goes against the hypothesis

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5
Q

Why is peer review important

A

-sharing ideas
-improves accuracy/quality
-allows for collaboration

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6
Q

What are the taxa in order

A

Domain, kingdom, phylum, class, order, family, genus, species

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7
Q

What are the three domains

A

Bacteria, archaea, and eukarya

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8
Q

What are the characteristics of the domain bacteria

A

Unicellular, no nucleus or organelles, has cell wall, can be helpful or harmful

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9
Q

What are the characteristics of the domain archaea

A

Unicellular, no nucleus or organelles, has cell wall, can live under extreme conditions

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10
Q

What are the characteristics of the domain eukarya

A

Unicellular or multicellular, have nucleus

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11
Q

What are the six kingdoms

A

Bacteria, archaea, animalia, plantae, fungi, and protista

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12
Q

What are the characteristics of the kingdom animalia

A

Multicellular, heterotrophic, no cell walls

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13
Q

What are the characteristics of the kingdom plantae

A

Multicellular, autotrophic, cell walls made of cellulose

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14
Q

What are the characteristics of the kingdom fungi

A

Mostly multicellular, heterotrophic, cell walls made of chitin

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15
Q

What are the characteristics of the kingdom protista

A

Mostly unicellular, heterotrophic and autotrophic, some have cell wall

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16
Q

What is the nucleus in an atom made of

A

Protons and neutrons

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17
Q

What are protons

A

Positively charged particles

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18
Q

What are neutrons

A

Neutrally charged particles

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19
Q

What are electrons

A

Negatively charged particles

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20
Q

What are the rings orbiting the atom’s nucleus called

A

Electron shells

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21
Q

What are atoms

A

The smallest part of and element that make up all living things

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22
Q

What are compounds

A

Two or more types of atoms that are chemically bonded

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23
Q

What are mixtures

A

A mix of two ore more types of atoms that are not chemically bonded

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24
Q

What are covalent bonds

A

When two nonmetals share a pair of valence electrons

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25
Q

What are ionic bonds

A

When electrons are transferred from metal atoms to nonmetal atoms

26
Q

What is the function of carbohydrates

A

They store and release energy

27
Q

What is the the function of lipids

A

Serve as long term energy storage and they make up cell membrane

28
Q

What is the function of nucleic acids

A

Store genetic information, controls cell activities, important to protein synthesis

29
Q

What is the function of proteins

A

Help digestion, movement, regulate organ functions, defend body, build structures, store food

30
Q

What are good sources of carbs

A

Fruits, vegetables, bread, rice

31
Q

What is a good source of lipids

A

Oils and fats (peanuts, corn, olive, soy)

32
Q

What is a good source of nucleic acids

A

Meat, fish, mushrooms

33
Q

What is a good source of protein

A

Eggs, meat, yogurt

34
Q

What are the monomers of carbs

A

Monosaccharides

35
Q

What bonds form between monosaccharides

A

Glycosidic

36
Q

What are the monomers of lipids

A

Triglycerides

37
Q

What bonds from between triglycerides

A

Ester bonds

38
Q

What are the monomers of nucleic acids

A

Nucleotides

39
Q

What bonds form between nucleotides

A

Phosphodiester bonds

40
Q

What are the monomers of proteins

A

Amino acids

41
Q

What bond form between amino acids

A

Peptide bonds

42
Q

What elements do carbs have

A

Carbon, oxygen, and hydrogen

43
Q

What elements do lipids have

A

Carbon, oxygen, and hydrogen

44
Q

What elements do proteins have

A

Carbon, oxygen, hydrogen, and nitrogen

45
Q

What elements do nucleic acids have

A

Carbon, oxygen, hydrogen, nitrogen, and phosphorus

46
Q

What molecules are carbs

A

Monosaccharides, disaccharides, trisaccharides, and polysaccharides

47
Q

What molecules are lipids

A

Triglycerides, fatty acids, phospholipids, saturated fat, unsaturated fat, and polyunsaturated fat

48
Q

What molecules are proteins

A

Dipeptides, tripeptides, and polypeptides

49
Q

What molecules are nucleic acids

A

DNA and RNA

50
Q

How do we test for starch

A

2-4 drops of iodine

51
Q

How do we test for protein

A

10 drops of NaOH (sodium hydroxide) and CuSO (upper sulfate)

52
Q

How do we test for simple sugar

A

20 drops of Benedict’s solution, then boil in water

53
Q

How do we test for lipids

A

Place drop of sample on paper, wait for 30 min, hold paper to light source to observe transparency

54
Q

What do positive and negative tests for starch look like

A

Dark purple/black for positive, no color change/brown for negative

55
Q

What do positive and negative tests look like for protein

A

Purple for positive, no color change/light blue for nagative

56
Q

What do positive and negative tests look like for simple sugar

A

Orange, green, or red for positive, no color change/blue for negative

57
Q

What do positive and negative tests look like for lipids

A

Transparent for positive, not transparent for negative

58
Q

What causes protein folding

A

The attraction between R-groups

59
Q

What is denaturation

A

When a polypeptide undergoes a changed shape which compromises its function

60
Q

What can lead to denaturation

A

When it too cold, a protein partially denatures? While when it is too hot, a protein fully denatures

61
Q

What are the properties of water

A

Polarity, cohesion, adhesion, density, solvency, latent heat of vaporization, and specific heat capacity